Drafting-table.



C. W. PURKEY.

DRAFTING TABLE. APPLICATION FILED 121212.10, 1913.

1,077,998, Patented N0v.11,1913.

A v gy i WITNESSES w- @WM /5 A RQ/ESI FIB-15,

INVENTOR e a spasm; or nsreomnm i m manna re-rais ns.

Specification of Letters Patent BatentedNov. 11,1913.

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To allewhom. it may. concern Be it known. that I, Care FImKnr,.-a. citizen of the United States, and a resident.

of Detroit, in the county ofi Wayne and State of Michigan, have invented, a new and. useful Drafting-Table, of which the following. is a specification.

This invention relates tothe construction provide a table with adjustable retainin means for-the drawing pa. er, so constructe that of greater or ess length may be retained by the same in substantially flat condition, and bemoved-up on down on the board as desired. p

This invention consistsyin. combination of tables for dra-ftsmen, and its object is to.

with the frame and aroller ateach end: of the same, of a chain wheel ati'each end. ofi

each roller," chains extendin around: d e chain-wheels, one at each si e of the table near the edges, and adjustable aper'holders extending across between: the ainsl This inventionfurther consistsrof. means for adjusting the distances between the chain-wheels and; in, th de ails. f: ae at ua tion of the paper holder, as fully shovamin,

the accompanying drawings and set tomb-in" the claims.-

In the accompanying drawings Figure 1 is a plan of the drawing board. Fig. 2.is a section of the same on the line 2-2 of Fig. 1. Fig. 3 "is a similar section on alarger scale. Fig. 4 is a plan showing the construction of the connection between the aper holders and the chain. Fig. 5 is a p an of a portion of the lower member and Fig. 6 is a Inn of a similar rtion of the upper mem r of the P9. or olders. Fig. '7 is a section on the line 7 of Fig. 6. Fig. 8 is an elevationof the wheel for turni the rollers. Fig. 9 is an elevation and Fig. 10 a section of the bearing of the upper'roller.

' Fig. 11 is an elevation and Fig. 12 a section of the bearing for the lower roller. Fig.

Ian 0 the is an elevation and Fi 14- a p chain.

Similar reference characters refer to like parts throughout the several views.

While the words plan and elevation, are usedin this description, these words are only relative terms as. the table maybe used in almost vertical position if desired.

The structure is made up of side pieces 1,"

between which aboard 2 extends. These side pieces and board! constitute the table proper and may be supported in. any manner desired... In the upper ends'of the side menibers1 are mounted bearings 3 for the shafts 4-,'jwhich extend from the hubs 5 on. which ithe wheels. 6. are either formed or secured. I'Ehse hubs- 5: have enlargements 7 which are ';Fig. 12, the lower. rolier 8 being an absolute duplicate oi the upper one and the shaft 4 shafts 4 of the upper roller, and the rightithesamewith the sole exception that it is ;that the lowenroller may be turned. The lower roller shaftse' and 9; are j ournaled' in blocks 26 slidhble in the frames 27 secured fin proper slots in the lower ends oi the side members: 1=, and adjustable by means of the screws28 in. the usual-i well known manner.

iimorderto carry theroller downtoits lower {this adjustment. isnot suflicient, then the scijews 2 8 must be, turned in in order to slack the chains and. a-iew. links removed fromthe The side members 1 have grooves .11 in the bottom of which a thin plate 12 0 steel may be mounted in order to avoid the side members 1 by the chains 13 which exmembers 1 are also preferably formed with grooves 14 in their lower sides to receive these chains. As shown in Fig. 14, the heavy links '15 of the chains 13 are formed wit screw-threaded holes 16 to receive the screws 17 which pass through plates 18, as shown in Fig. 4:. To these plates 18 are secured, preferably by rivets 30, the th1n strlps of metal 19, preferably steel, whichare formed with upstanding pins or'teeth 20 as shown in Fig.' 5. Secured to these str1ps19 are other strips 22 of the same width formed sition by means of a screw 24 at each end which enter the holes 25 in the strips 19. and the lates 18. y

, en it is desired to secure a sheet of strip 22 out from across the board 2, after whlch the paper may be secured in position by press: mg down the paper on theplns or teeth 20.

The upper strips 22are then swung back secured'in-the roller 8- as shown in section in of the lower roller being the same as the" ilonger and has a wheel 10 secured to it so 'with holes 23 .into which the teeth 29 may project. The upper plates are held in popa r29 in position, a screw 24 of each.

is removed and the strips 22 swung hand 9 of the lower roller also being 51in Fig. 1'. these screws are shown turned out :'&limit in' order to tighten the chains 13. If I cutting or wearing down of the wood of the tend around the chain-wheel 6. The side tlon.

- ture, a pair of chains extending around said:

the chains.

. parallel side members and a board. extend asshown in Fig. 1. But when the paper "so that they may slip in the slots 31, for the pitch line of the chain wheels is of less dipass around both, rollers, both. aper holders so that the pins or teeth will project into the holes 23, after which the screws 24 are replaced to hold the upper strips in posi- So long as the paper is so short that it need not pass around either roller, the screws 17 remain in the inner ends of-the slots 31,

lsto pass around either roller, the screws 17 of the adjacent paper holder will be loosed amter than the rollers. If the paper is to chain wheels, and adjustable paper holders extending across the board and connected to .2. In a drafting table, the combination ofingbetween them, rollers and chain wheels mounted adjacent'the' ends of the side mems: bers, a pair of chalns extend around said chain wheels, and*--two papenolders -eachk,

formed of two thin plates extending across the board and connected to the chains.

' 3. Ina draftin table, the combination of parallel side mem ersand a board extending between them, rollers and chain wheels mounted adjacent the ends of the side members, a air of chains extendin around said chain w eels, and two paper ho ders extendlng across the board and connected to the chains, each formed of two thin strips of metal, one of the stri s having perforations and the other strip ibrmed with teeth extending into said perforations.

4. In a drafting table, the combination of grooved parallel side members and a board extending between them, a roller mounted adjacent one of the ends of the board and havinga chain wheel at each end, a second roller adjustably mounted adjacent the other end of the board and having a chain wheel at each end, chains extending around said wheels parallel to eachother and to the side members, and paper holders extending across the board and adjustably secured at their ends to-sa-id chains. a

In testimony whereof I have signed this specification ingthe ing witnesses, 1

' {CARL W. PURKEYH .-Witnesse's:

Hose W. Knmmsamo,

presence of two Subsorib- 

